Any good places to find open source characters?

I have no idea where to put this, but I presume this is the closest fit for it.

I was looking for some open-source characters/settings/creatures to put in a Tumblr masterpost of "cool open source characters you can us in your writing" and while I found some on Deviantart and a few other sites, and I know about the databases of the Fear Mythos and the Public Domain Superheroes wiki's "Open Source Characters" section, but other than those I can't seem to find many of them. Anybody know of any other good resources for open-source characters/settings/creatures?

Beyond that I don't think we have any single page that holds what you're looking for, nor do I know personally of any archives or lists off the wiki that might help. However, if you build up a good enough collection of such characters, maybe you can create a page here with it?